Swelling Component Oxygen Absorbent Composition
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Solution Overview
Problem
Existing oxygen absorbent compositions face challenges in reducing size while maintaining oxygen absorbing speed, particularly when pressure molding, which often results in low gas permeability and reduced oxygen absorbing capacity.
Innovation Solution
Incorporating a swelling component capable of absorbing water or moisture, such as bentonite and carboxymethylcellulose, into the oxygen absorbent composition to maintain oxygen absorbing performance even in pressure molded form, thereby reducing the size of the oxygen absorbent without compromising its speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If pressure molding is used to reduce the volume of oxygen absorbent, then the size is reduced, but the gas permeability decreases and oxygen absorbing speed becomes extremely low
Solution Approach 1:
The patent uses porous polymer beads as the carrier structure, which provides inherent porosity to maintain gas permeability even in the molded state. The porous structure allows oxygen to penetrate through the molded oxygen absorbent while maintaining the reduced size, thus resolving the contradiction between volume reduction and gas permeability.
Solution Approach 2:
The patent creates a composite structure by embedding the oxygen absorbent composition within the porous polymer beads. This composite approach combines the volume reduction benefit of molding with the gas permeability provided by the porous polymer matrix, allowing both size reduction and maintained oxygen absorbing speed.
2Volume of stationary object
If the oxygen absorbent composition is molded into a compact form, then the volume is reduced, but the reactive surface area is significantly reduced
Solution Approach 1:
The porous polymer beads provide a three-dimensional porous network that maintains reactive surface area even when the overall volume is reduced through molding. The porosity creates numerous pathways and surfaces for oxygen absorption reactions, preventing the surface area reduction that would normally occur with compact molding.
Solution Approach 2:
The oxygen absorbent composition is nested within the porous polymer beads, creating a core-shell structure where the inner core contains the reactive oxygen absorbent materials while the outer porous shell provides surface area and gas permeability. This nesting allows volume reduction while preserving reactive surface area through the porous outer layer.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The use of swelling components like bentonite and carboxymethylcellulose in the oxygen absorbent composition allows for a significant reduction in size while maintaining or enhancing oxygen absorbing speed, making it suitable for applications requiring rapid oxygen absorption, even in low humidity conditions.
Implementation Method 1
Incorporating a swelling component capable of absorbing water or moisture, such as bentonite and carboxymethylcellulose, into the oxygen absorbent composition to maintain oxygen absorbing performance
Data Source
AI summary
A molded oxygen absorbent composition is composed of a molded product of an oxygen absorbent composition which contains an oxygen absorbing substance, water or moisture, and a swelling component capable of being swelled with water or moisture. The molded oxygen absorbent composition is reduced in its size and excellent in oxygen absorbing property.